Choose a version:
21% The original file has 279677 bytes (273.1k) and is available from the project website.
There you can find the official minified version, too, which brings down the size to 59197 bytes (57.8k, 21%).

After GZIP compression these minified files vary in size:
Boot
  26911 bytes (26.3k)
CDN, direct link
Baidu
  24334 bytes (23.8k)
CDN, direct link
cdnjs
  24265 bytes (23.7k)
CDN, direct link
gzip -6 (default)
  24191 bytes (23.6k)
local copy
cdnhttps
  24170 bytes (23.6k)
CDN, direct link
gzip -9
  24143 bytes (23.6k)
local copy
libdeflate -12
  23602 bytes (23.0k)
local copy
7zip -mx=9 -tgzip
  23324 bytes (22.8k)
local copy
kzip -s0 -rn -b3
  23212 bytes (22.7k)
local copy
pigz -11 -n
  23209 bytes (22.7k)
local copy
Zopfli
  23178 bytes (22.6k)
local copy

perma-link to the smallest file on my server:
http://minime.stephan-brumme.com/files/angularjs/angular-0.9.9.min.js

You will automatically get the smallest AngularJS 0.9.9 file, ETag caching is available and
if your browser doesn't support GZIP decompression then the uncompressed version will be sent.

Currently best Zopfli settings

Save 992 bytes by using my AngularJS 0.9.9 Zopfli version instead of the best available CDN (4.28% smaller than cdnhttps, 23178 vs. 24170 bytes):
You can use my super-compressed files for whatever purpose you like as long as you respect the library's original license agreement.
There are no restrictions from my side - but please avoid hot-linking if you run a high-traffic website.

These command-line settings yielded the best compression ratio so far (Linux version of zopfli-krzymod):
zopfli --i100000 --mb8 --mls256 --bsr9 --lazy --ohh

(found February 5, 2016)
Description Value Parameter
iterations 100000  --i100000
maximum blocks 8  --mb8
maximum length score 256  --mls256
block splitting recursion 9  --bsr9
lazy matching in LZ77 yes  --lazy
optimized Huffman headers yes  --ohh
initial random W for iterations 1  --rw1
initial random Z for iterations 2  --rz2

Verify file integrity

After decompression, my uncompressed files are identical to the original ones:

MD5:
curl --silent --compressed https://code.angularjs.org/0.9.9/angular-0.9.9.min.js --location | md5sum
9c9d09d37d019f0350edd97ae54dc94b  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-0.9.9.min.zopfli.js.gz | md5sum
9c9d09d37d019f0350edd97ae54dc94b  -

SHA1:
curl --silent --compressed https://code.angularjs.org/0.9.9/angular-0.9.9.min.js --location | sha1sum
f754b344d80f3e8782fd78dba59d87b74e89a687  -
curl --silent --compressed http://minime.stephan-brumme.com/files/angularjs/angular-0.9.9.min.zopfli.js.gz | sha1sum
f754b344d80f3e8782fd78dba59d87b74e89a687  -

These CDNs send you the original file:
CDN Size (compressed) MD5 (uncompressed) Timestamp
Boot 26911 bytes 9c9d09d37d019f0350edd97ae54dc94b March 18, 2015 @ 10:06
cdnjs 24265 bytes 9c9d09d37d019f0350edd97ae54dc94b March 28, 2014 @ 14:15
cdnhttps 24170 bytes 9c9d09d37d019f0350edd97ae54dc94b December 24, 2015 @ 07:32

And some CDNs send you a different file:
CDN Size (compressed) MD5 (uncompressed) Comment / Diff Timestamp
Baidu 24334 bytes a00e31e40a1b9458c9e7c787b681180e only whitespaces differ June 5, 2014 @ 10:05

Note: only the MD5 hashes are shown to keep things simple.

Other Versions

Available AngularJS versions at minime.stephan-brumme.com:

1.6.5, 1.6.4, 1.6.3, 1.6.2, 1.6.1, 1.6.0,
1.5.11, 1.5.10, 1.5.9, 1.5.8, 1.5.7, 1.5.6, 1.5.5, 1.5.4, 1.5.3, 1.5.2, 1.5.1, 1.5.0,
1.4.14, 1.4.13, 1.4.12, 1.4.11, 1.4.10, 1.4.9, 1.4.8, 1.4.7, 1.4.6, 1.4.5, 1.4.4, 1.4.3, 1.4.2, 1.4.1, 1.4.0,
1.3.20, 1.3.19, 1.3.18, 1.3.17, 1.3.16, 1.3.15, 1.3.14, 1.3.13, 1.3.12, 1.3.11, 1.3.10, 1.3.9, 1.3.8, 1.3.7, 1.3.6, 1.3.5, 1.3.4, 1.3.3, 1.3.2, 1.3.1, 1.3.0,
1.2.32, 1.2.31, 1.2.30, 1.2.29, 1.2.28, 1.2.27, 1.2.26, 1.2.25, 1.2.24, 1.2.23, 1.2.22, 1.2.21, 1.2.20, 1.2.19, 1.2.18, 1.2.17, 1.2.16, 1.2.15, 1.2.14, 1.2.13, 1.2.12, 1.2.11, 1.2.10, 1.2.9, 1.2.8, 1.2.7, 1.2.6, 1.2.5, 1.2.4, 1.2.3, 1.2.2, 1.2.1, 1.2.0,
1.1.5, 1.1.4, 1.1.3, 1.1.2, 1.1.1, 1.1.0,
1.0.8, 1.0.7, 1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0,
0.10.6, 0.10.5, 0.10.4, 0.10.3, 0.10.2, 0.10.1, 0.10.0,
0.9.19, 0.9.18, 0.9.17, 0.9.16, 0.9.15, 0.9.14, 0.9.13, 0.9.12, 0.9.11, 0.9.10, 0.9.9, 0.9.8, 0.9.7, 0.9.6, 0.9.5, 0.9.4, 0.9.3, 0.9.2, 0.9.1, 0.9.0

The project site contains an overview how well these versions were compressed.
Other interesting projects are BackboneJS, Bootstrap, D3, Dojo, Ember, jQuery, Knockout, lodash, React, Socket.IO, ThreeJS, UnderscoreJS and Vue.

Changelog

Best Zopfli parameters so far:
Size Improvement Parameters Found
23178 bytes -2 bytes zopfli --i100000 --mls256 --bsr9 --lazy --ohh February 5, 2016 @ 10:59
23180 bytes -3 bytes zopfli --i10000 --mls256 --bsr9 --lazy --ohh November 26, 2015 @ 11:04
23183 bytes -1 byte zopfli --i1000 --mls256 --bsr9 --lazy --ohh September 17, 2015 @ 03:58
23184 bytes -3 bytes zopfli --i1000 --mls256 --bsr12 --lazy --ohh September 17, 2015 @ 03:57
23187 bytes -3 bytes zopfli --i1000 --mls2048 --bsr10 --lazy --ohh September 7, 2015 @ 21:30
23190 bytes -2 bytes zopfli --i1000 --mls512 --bsr16 --lazy --ohh September 7, 2015 @ 21:29
23192 bytes -7 bytes zopfli --i1000 --mls512 --bsr9 --lazy --ohh September 7, 2015 @ 21:28
23199 bytes zopfli --i100 --mls2048 --bsr13 --lazy --ohh September 7, 2015 @ 16:20

If there are multiple parameter sets yielding the same compressed size, only the first one found is shown.

Most recent activity on June 16, 2016 @ 14:41.

Heatmaps

This Zopfli heatmap visualizes how compression changes when modifying the --bsr and --mls parameter.
Cell's contents is the best filesize achieved (in bytes, hover with mouse over cells to see number of iterations).

Good parameters are green, bad are red. The best and worst are bold as well.
The brightness of the blue background color indicates how many iterations were processed:
10,000 or 100,000.
bsr \ mls
2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768
bsr \ mls
2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768
23217 23214 23214 23217 23217 23211 23209 23216 23206 23195 23199 23198 23223 23224 23206
23204 23206 23207 23215 23215 23220 23204 23213 23208 23202 23205 23194 23204 23190 23196
23194 23193 23192 23192 23190 23198 23200 23208 23187 23190 23191 23204 23206 23189 23189
23191 23191 23191 23197 23202 23196 23192 23190 23188 23200 23208 23193 23201 23220 23191
23189 23190 23189 23191 23190 23191 23192 23200 23194 23190 23189 23192 23190 23188 23207
23190 23190 23203 23191 23201 23190 23187 23178 23189 23193 23191 23192 23191 23191 23192
23189 23192 23191 23193 23187 23194 23191 23179 23189 23190 23185 23193 23186 23186 23190
23192 23191 23191 23189 23192 23195 23190 23187 23189 23191 23186 23193 23186 23190 23189
23189 23191 23191 23192 23191 23188 23187 23178 23187 23194 23192 23191 23189 23188 23190
23192 23192 23191 23192 23192 23188 23190 23190 23190 23191 23187 23190 23189 23193 23190
23191 23191 23191 23192 23191 23189 23188 23193 23195 23188 23188 23193 23197 23193 23191
23189 23189 23190 23197 23192 23193 23191 23189 23189 23191 23191 23189 23193 23190 23192
23191 23193 23192 23194 23191 23189 23190 23189 23188 23190 23187 23194 23190 23192 23190
23194 23193 23196 23193 23191 23188 23189 23179 23183 23192 23191 23189 23188 23189 23191
23192 23191 23192 23196 23193 23193 23188 23192 23187 23188 23206 23189 23190 23189 23190
23187 23192 23193 23192 23194 23195 23188 23183 23187 23191 23190 23189 23188 23191 23192
23192 23193 23194 23194 23191 23195 23186 23187 23190 23186 23188 23194 23192 23188 23192
23191 23191 23192 23193 23194 23192 23190 23193 23190 23190 23194 23190 23186 23202 23193
23190 23188 23193 23192 23193 23188 23190 23191 23188 23191 23189 23192 23192 23194 23191
23191 23191 23189 23192 23191 23196 23190 23182 23189 23191 23189 23189 23193 23188 23192
23191 23190 23190 23192 23190 23190 23190 23190 23189 23191 23189 23189 23186 23188 23193
23189 23192 23191 23192 23191 23188 23189 23193 23188 23189 23187 23189 23186 23189 23189
23189 23190 23190 23191 23191 23193 23190 23190 23189 23188 23191 23193 23189 23187 23191

Due to the Monte Carlo design of my search algorithm, not all parameters have reached the same number of iterations yet:
Iterations Min. Bytes Reduction Coverage
100 23191 bytes 100%
1,000 23183 bytes -8 bytes 100%
10,000 23180 bytes -3 bytes 100%
100,000 23178 bytes -2 bytes 1.16%
1,000,000
10,000,000

KZIP has far less options available for tuning/optimization. I only played around with the number of blocks (parameter -n):
Blocks Min. Bytes Compared To Best Zopfli Compared To Best KZIP
23271 bytes +93 bytes (+0.40%) +59 bytes
23678 bytes +500 bytes (+2.16%) +466 bytes
23272 bytes +94 bytes (+0.41%) +60 bytes
23212 bytes +34 bytes (+0.15%)
23229 bytes +51 bytes (+0.22%) +17 bytes
23233 bytes +55 bytes (+0.24%) +21 bytes
23254 bytes +76 bytes (+0.33%) +42 bytes
23286 bytes +108 bytes (+0.47%) +74 bytes
23325 bytes +147 bytes (+0.63%) +113 bytes

Non-DEFLATE Algorithms

Archivers based on completely different compression algorithms often produce superior results.
Unfortunately, browsers only support gzip compression at the moment.
Algorithm Program Parameters Size Compared To Best Zopfli
ZPAQ (Wikipedia) zpaq zpaq -method 69 20310 bytes -2868 bytes (-12.37%)
RAR (proprietary) RAR rar a -m5 -md64m -mc63:128t -mt1 20881 bytes -2297 bytes (-9.91%)
Brotli (Wikipedia) brotli brotli -q 11 21478 bytes -1700 bytes (-7.33%)
PPMd (Wikipedia) 7zip 7za a -mx=9 -m0=ppmd 21901 bytes -1277 bytes (-5.51%)
LZMA2 (Wikipedia) xz xz -9 22796 bytes -382 bytes (-1.65%)
Burrows-Wheeler transform (Wikipedia) bzip2 bzip2 -9 23348 bytes +170 bytes (+0.73%)
ZSTD (Wikipedia) zstd zstd -19 23455 bytes +277 bytes (+1.20%)

Detailled Analysis

I wrote a DEFLATE decoder in Javascript. Click the button below to start a client-side analysis of the smallest gzipped files (may take a second):


Notes: pigz is a fast open source multi-threaded implementation of gzip written by one of the original authors of gzip.
However, when using compression level 11, pigz actually switches to the slower Zopfli algorithm and isn't multi-threaded anymore.
KrzyMOD's extensions to Zopfli offer the highest level of configuration and is therefore used for my brute-force search.
Ken Silverman wrote the closed-source KZIP compression program and Jonathon Fowler ported it to Linux.
Defluff was created by Joachim Henke; DeflOpt is a tool by Ben Jos Walbeehm.

website made by Stephan Brumme in 2015 and still improving in 2017.
all timestamps are displayed in central european time. see my changelog.
no flash, not even images or external css files - and everything squeezed into a single html file.
which was handsomely compressed before releasing it into the wild internet - obviously.

please visit my homepage and my blog, too.
email: minime (at) stephan-brumme.com